Treatment of Spent Sulfuric Acid Pickling Liquors

Fradkin, A. M.; Tooper, E. B.

doi:10.1021/ie50541a033

Cited by 6 publications

(1 citation statement)

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“…On the basis of the total titanium dioxide output in China in 2010, the amount of waste liquor produced was in the region of 300–600 million tons in 2010 alone. The disposal of spent liquor has posed a serious problem for TiO 2 production , and has prompted the titanium dioxide industry to give serious consideration to the recovery of the sulfuric acid that is currently going to waste.…”

Section: Introductionmentioning

confidence: 99%

Determination and Modeling of Vapor–Liquid Equilibria for the Sulfuric Acid + Water + Butyl Acetate + Ethanol System

Asselin

2013

Ind. Eng. Chem. Res.

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A novel azeotropic distillation for sulfuric acid recovery, which uses organic solvents as entrainers, is proposed. This new distillation process may provide significant energy savings. Vapor–liquid equilibria (VLE) data were determined by the quasi-static ebulliometric method for the following systems at (30, 60, and 90) kPa: (1) sulfuric acid + water + ethanol; (2) sulfuric acid + water + butyl acetate; and (3) sulfuric acid + water + butyl acetate + ethanol. Through the use of the OLI software, a chemical model was established via regressing the experimental data to obtain the mixed solvent electrolyte (MSE) model parameters. The average absolute deviations of boiling points for all systems are only 1.34 K. The new model with newly obtained parameters was successfully applied to predict the VLE for the sulfuric acid + water + butyl acetate ternary system at constant pressure, providing important VLE information for the recovery of spent sulfuric acid by this new azeotropic distillation technology.

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Section: Introductionmentioning

confidence: 99%

Determination and Modeling of Vapor–Liquid Equilibria for the Sulfuric Acid + Water + Butyl Acetate + Ethanol System

Asselin

2013

Ind. Eng. Chem. Res.

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Ein Verfahren zur Aufbereitung von sauren Beizbädern und Rückgewinnung des Eisens

Poliskin

1966

Chemie Ingenieur Technik

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Zur Aufbereitung von verbrauchten Schwefelsäure‐Beizbädern der Stahl‐Industrie wurde im Labormaßstab ein Verfahren entwickelt, bei dem durch Kationen‐Austausch das Eisen entfernt wird und reine Schwefelsäure‐Lösungen zurückerhalten werden. Durch Regenerierung der Austauscher mit Salpetersäure werden Eisen(II)‐nitrat‐Lösungen gewonnen, die sich beim Erhitzen auf rd. 180°C unter Druck in Salpetersäure und Eisenoxid umwandeln lassen.

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Ionenaustauscher Und Ionenaustauschverfahren Bei Der Abwasserbehandlung

OEHME¹

1974

XXIVth International Congress of Pure and Applied Chemistry

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Treatment of Spent Sulfuric Acid Pickling Liquors

Cited by 6 publications

References 0 publications

Determination and Modeling of Vapor–Liquid Equilibria for the Sulfuric Acid + Water + Butyl Acetate + Ethanol System

Determination and Modeling of Vapor–Liquid Equilibria for the Sulfuric Acid + Water + Butyl Acetate + Ethanol System

Ein Verfahren zur Aufbereitung von sauren Beizbädern und Rückgewinnung des Eisens

Ionenaustauscher Und Ionenaustauschverfahren Bei Der Abwasserbehandlung

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